Attachment for carburetors



l. T... FREDERICK ATTACHMENT FOR CARBURETORS 1,529,694 L, T. FREDERHQK y ATTACHMENT Fon cmunmos File July 1921 .5 Sheng-sheet 2 Lomb fedef'cz;

March 17, 1925. 1,529,694-

L. T. FREDERICK ATTACHMENT 'FOR CARBRETORS Filed July 25, 1921 5 Sheets-Sheet 3 .cwflederid: f MW State of Indiana,

Patented Mar. 17, 1925.

PATENT orti'.

I OUIS T. FREDERICK, OF VALPARAISO, INDIANA.

ATTACHLEENT FOR CARBURET ORS.

Application filed July 23,

To all whom t may concem:,

Be it known that I, Lotus' T. FREDERICK, a citizen of the United States, residing at Valparaiso, in the county of Porter`V and have invented a new and 'useful Improvement in Attachments for Carburetors, of which the following is a specification.

This invention relates to attachments for carburetors or fuel mixers of internal coinbustion engines, and will be'fully understood trom the following description of a specific embodiment thereof illustrated by the accompanying; drawingsin which- Fig. l shows the device in side elevation, showing it attached to a carburetor and illustrating its position relative to the exhaust manifold ot' an internal combustion engine, Fig. 2 is a View taken as' indicated by the line 2 ot' Fig. 1,.Fig.-3 is a view ta-ken as udicated by the line 3 of Fig. l, Fig. 4 is a view of the device in end elevation, Figs. 5 and 6 are views inside elevation of the two halves the device shown in Fig. 4, viewing` said halves in the position they would occupy if opened outwardly as indicated by the arrows, Fig. 7 is a vertical sectional view taken as indicated by the line 7 of Fig. l, Fig. 8 is a vertical sectional View of the top ot-` the needle valve of the carburetor, showing the manner ot' attaching my device thereto, and Fig. 9 is a plan view of the top of such needle valve.

As shown in the drawings, 10 indicates the exhaust manifold of an internal combustion engine, and 1l the. carburetor thereof. My device comprises primarily a substantially lU shaped pipe having a horizontal portion 13 lying adjacent the exhaust inanit'old l0, a horizontal portion 14 joined to the air inlet l5 of the carburetor l1, and a vertical portion 16 connecting,r the horizontal portions 18 and 14,. The U shaped pipe as a whole I have indicated by the numeral 20. pipe is formed of two substantially ar halves, each of which is a single ri`he numeral 22 indicates the half l adyacent the exhaust manifold, and

"he two halves 22 and 23 are provided i registering bosses or lugs 27 adapted receive machine screws or bolts 28 for the purpose ot holding the two halves together.

The lower end of the pipe as indicated by- ;fr is attached to the air intake o t the carbaretor 11, and the upper end is supported other halt is indicated by the numeral 23.

1921. Serial N0. 487,100.

in any suitable manner in order to hold the portion 13 adjacent and in close proximity t'o the exhaust manifold l0. As here shown, such supportis accomplished by means of a clip 30 having nut 31 and the other end fastened by the 1nachine screw 32 into part 23. Additional support is given by attachingr a small plate 35 to the part 22 and clamping the saine un-` der one end of the bar 36 which is provided for holding the exhaust manifold in place.

The wall of the pipe portion 22 which lies adjacent the exhaust manifold 10 is indicated by 40. This wall is provided with perforations 41, whereby air heated by the manifold l0 may vpass from the space, bctween this wall and the manifold to the interior of the pipe and thence to the carburetor 11. By this construction, it will bc seerpthat the carburetor is supplied with heated air. i

The outer portion 23 of the pipe 20'is also provided at its upper end with a hole 115 normally closed vby a valve disk 46 held in place by the tlatspringr 4T. The spring al? has sutlicient elasticity to permit the valve disk 46 to be movedinwardly a short distance by atmospheric pressure, thereby opening the hole 4.5, when the engine is running at high speeds and causing considerable vacuum or rarefaction ot air within pipe 2U. It will be seen that by this construction, at high engine speeds, some cold air will enter the opening and thus preventthc car" buretor 11 from receiving ytoo much hot air.

The upper horizontal part of the pipe portion 23 is also provided with a slantina' substantially cylindrical projection 5() adapted to house a iii-metallic therinostatic spiral spring 5l constructed in the manner trom two kinds of metals with ditiercnt coeflicients oi expansion vin any suitable manner so that an increase in temperaturc will cause the spring,` to open or un wind, and 'vice versa. The lower end of the spring 5l is attached to the casing 50 by the screw 53, and its upper end is fixed to a bushing 54 by the screw 55 which also fixes said bushing' to the bar 56. The bar 56 is substantially cylindrical in shape, and extends through a hole in the top of the casing lt is provided ou its upper end with an enlargement 57. A rod 58 extends through a bore in the bar 56 and is adapted to be adjustably set therein by means of the setl screw 60. The bar 58 has its lower end atone .end engaged under the ordina r v more tached b y means of the universal joint 61 to the bar 62, the lower end of which is forked as indicated by 63. The` rongs of the fork 63 are adapted to enga e lioles 65 in the adjusting handle 66 on t e top of the needle valve of the carburetor 11. `This needle valve controls the gasoline-jet inthe carburetor.` By this construction, the parts will so operate, that when the spring 51 becomes heated it will open or unwind, thereby rotatin Ithe rods 58 and 62 to close the valve 66. he parts may be adjusted as desired by loosenlng the set screw 60 rotating the rod 58 to the proper position and then again tightening the set screw 60. In operation of the device, heated air is supplied to the oarburetor throu h the' holes 41. After the engine runs a w ile and the parts become heated', .the spring 51 will operate as described above to'close the needle valve 66. This is proper, because as internal combustion engine upon starting and when cold requires asoline than .after they part-s become het. fthe engine isspeeded up so that considerable rarefaction is caused within the pipe 20, the valve disk 46 will be pressed inward slightly b atmospheric pressure to ad.- mit cold air t rough the opening 45 and' thus permit the carburetor from drawing `too much heated air, or air that is too hot.

Although the presenty invention has been describedinv connection with thespecific details of a device embodying it, it is not ini tended that these details shall be regarded as limitations upon the scope of the invention except insofar as included in the accompanying claims.- What I claim as new and desire to secure by Letters Patent is: f v 1 1 1. An air heater for carburetors comprisneuem in inrcombination, a pipe having a blosed en portion and openings in a side to-admit heated air from t e vsurface of an exhaust manifold, the remaining end of said pipe beingopen'and Aada ted to be placed in communication with t e airinlet of acarbu'retor, said'pipe'having a thermostat chamber in itswal opposite said openings and opening to the interior ofthe pipe, a thermostat in said chamber, means to connect said thermostat with the needle Valve ofthe carburetor for control of supply of liquid fuel to the same, a suction operated cool air intake'in the lWall of the plpe betweenits closed end and said chamber, whereby increase of temperature of 'air drawn through said openwill diminish the rate of fuel supply and whereby the latter ell'ect will be lessened at'engine speeds suilicient to ope'nlsaid coolv air intake.

2. `An air 'heater for carburetors comprising, in combination, asubstantially U Shaped pipe formed of longitudinal portions-,1fl means to secure said portions together, means to attach said .device to an engine', one of s aid rtions having o enings adaptedto admitcated air from t e surface oitV an exhaust manifold, the other portion having af'th'ermostat chamber opening into the device opposite said openings when theadevice is' assembIed, the assembleddevi'cehaving an open end vadapted to 'com,munica-te,with Athe air intake of a carburetor, a thermostat .in

said chamber and means to connect said thermostat withy the fuel `needle valve 'of the carburetor.

In witness whereof I have hereunto set my hand and seal 1921. Louis T. FREDERICK. [as] this 18thday oflMarch, 

